Seismic applicability analysis of high‑speed railway multi‑span simply‑supported bridges based on simplified model

• Autorzy: Jiang Lizhong , Zhao Yinting , Zhang Yuntain , Zhou Wangbao , Zhong Bufan , Lai Zhipeng , Feng Yulin

Identyfikatory

DOI

10.1007/s43452-023-00753-0

• Języki publikacji: EN

Abstrakty

EN

CRTS II ballast less track is more commonly used in railway operations since it can meet the railway comfort and smoothness requirements. The effects of track constraint on the seismic response of high-speed railway simply-supported bridges can not be neglected. However, refined track structure modeling can significantly increase the computational time. Therefore, adopting a reasonably simplified model (SM) can improve computational efficiency effectively. Based on the principle of virtual work, the equivalent system is adopted instead of the track structure, and build a simplified model of bridge-track system. And on the basis of considering the randomness of the earthquake, the seismic response of the track-bridge model, the simplified model and the trackless model with different span numbers are compared, the over-capacity ratio and track constraint effect of the high-speed railway bridge-track system under the earthquake are analyzed. The analysis shows that the simplified efficiency of simplified model is up to 85% under longitudinal and transverse ground motions, and the seismic responses are in good agreement with those of the bridge-track system model; The track structure has a greater influence on the safety of the over-capacity probability (SPO) of the bridge structure under the longitudinal ground motion, particularly when the number of spans is high and ignoring the track structure may underestimate the over-capacity probability of some structures.

Słowa kluczowe

EN

high-speed railway; simply-supported bridge; simplified model

PL

kolej dużych prędkości; most jednopodporowy; model uproszczony

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 4
• Strony: art. e220, 1--20
• Opis fizyczny: Bibliogr. 33 poz., rys., tab., wykr.

Twórcy

autor

Jiang Lizhong

• School of Civil Engineering, Central South University, Changsha, China

autor

Zhao Yinting

• School of Civil Engineering, Central South University, Changsha, China

autor

Zhang Yuntain

• School of Civil Engineering, Central South University, Changsha, China

autor

Zhou Wangbao

• School of Civil Engineering, Central South University, Changsha, China

autor

Zhong Bufan

• School of Civil Engineering, Central South University, Changsha, China

autor

Lai Zhipeng

• School of Civil Engineering, Central South University, Changsha, China

autor

Feng Yulin

• School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, China

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